Have you heard about FIT yet? Even if you have, do you know what makes it signficantly different from other testing frameworks? Here is a re-introduction to FIT that highlights one of its most important features.

I don't care how good you think your design is. If I can't walk in and write a test for an arbitrary method of yours in five minutes its not as good as you think it is, and whether you know it or not, you're paying a price for it.